Robert Sciarrino/The Star-LedgerGov. Chris Christie and Sen. President Stephen Sweeney (D-Gloucester) shake hands after a press conference where it was announced that they have reached a deal on a key part of Christie's "tool kit."

TRENTON — Calling it an attempt to throw out collective bargaining rights, leaders of New Jersey’s public workers unions Monday said they will launch a full court press against a bill sponsored by Senate President Stephen Sweeney that would force public employees to pay more for their health care benefits.

Hetty Rosenstein, state director for the Communication Workers of America, said her union would picket, extract pledges from lawmakers to oppose it and hold "lobby days" against the bill (S2718) over the next several weeks.

"It becomes illegal to negotiate anything different than what’s in that bill," said Rosenstein. "It preempts all collectively bargaining."

Bill Lavin, president of the state Firefighters Mutual Benevolent Association, said police and firefighters will protest it at a Statehouse rally Thursday and press all 120 lawmakers.

"It’s totally unacceptable. I think if that were to pass, it will guarantee that the Democrats will lose the majority," he said. "We’re shocked that Steve Sweeney, who calls himself a Democrat, would act in this manner ... He’s rolled over for the governor in every instance."

The pushback comes as the legislation has gained bipartisan support in the state Senate, with Jennifer Beck (R-Monmouth) signing on as a prime sponsor.

Public employees pay 1.5 percent of their salaries towards their health benefits. Under Sweeney’s plan and a proposal by Gov. Chris Christie, workers would pay a portion of their premiums instead and would have more plans to choose from.

Under Christie’s plan, public workers would pay 30 percent of their premiums within three years. Under Sweeney’s, they would pay a sliding scale based on income, with the highest earners eventually paying 30 percent.

"I understand people being emotional, but we really have to be fair with people. We’ve got to be fair with taxpayers," said Sweeney, who denied the bill was an attempt to eliminate collective bargaining. "I’m the guy that did paid family leave. I’m the one that did the minimum wage (increase). I’m absolutely pro-worker."

Beck said she still has reservations about parts of the bill. She agreed with Sweeney that employees should pay rates based on their income, but agreed with Christie that current retirees should pay part of their premiums. "While the bill is not perfect, it’s a great place to start," she said.

Christie spokesman Kevin Roberts said the governor’s office was not upset that Beck signed onto the Democratic proposal.

"The governor has been pretty clear about the differences between our proposal and Sweeney’s. But the governor has also indicated we’re not so far apart compared to where we are on other things like pension proposals," he said.

Editor's note: This story has been updated to reflect that although several aspects of Christie’s plan would apply to current retirees, they would not pay a portion of their premiums.